4
0: 0.0	0.0	0.5	1
1: 1.0 	0.0 	0.5    	1
2: 1.0 	1.0     0.5	1
3: 0.0 	1.0     0.5    	1


4
0: 0	1	1
1: 1 	2 	1
2: 2 	3 	1
3: 3 	0 	1
